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0. A. BALPH 8x13. P. s. WRIGHT. PIREPROOF FLOOR AND CEILING.

Patented May 11, 1897.

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UNITED STATES PATENT Curran.

CHARLES A. BALPH, OF PITTSBURG, PENNSYLVANIA, AND ELISHA s. WRIGHT, OFNEW YORK, N. Y.

FIREPROOF FLOOR AND CEILING.

SPECIFICATION forming part of Letters Patent No. 582,385, dated May 11,1897.

Application filed August 12,1396. Serial No. 602,478. (No model.)

To all whom, it may concern.-

Be it known that we, CHARLES A.'BALPH,.a resident of Pittsburg, in thecounty of Allegheny and State of Pennsylvania, and ELIsHA P. S. WRIGHT,a resident of New York, county and State of New York, have invented anew and useful Improvement in Fireproof Floors and Ceilings; and we dohereby declare the following to be a full, clear, and exact descriptionthereof.

Our invention relates to the construction of fireproof floors andceilings, and more particularly to a certain form of such floors andceilings as is set forth in Letters Patent of the United States No.527,042, granted to us on the 9th day of October, 1894:. In that patentthere are metal bars of a length corresponding to the space between thebeams and extending transversely of and connected to the beams, saidbars being supported on their edges, and a filling of concretecompletely embedding said bars. The present invention relates to a novelmeans of connecting said bars to said beams, so that said bars will besupported on their edges. I

The invention comprises certain novel features, all of which will befully hereinafter set forth and claimed.

In the accompanying drawings, Figure 1 is a perspective view of aportion of a beam, showing the ends of bars supported thereon in themanner of the invention. Fig. 2 is a like view with the concrete inposition and partly broken away to expose a portion of the bars.

The letter a designates a suitable metal I- beam such as employed infireproof structures. Formed integral with the web of the beam a duringrolling, or riveted thereto, if desired, are the ledges 6, extendingalong said web on opposite sides thereof. The ledges 19 support the bars0, which extend transversely of the beams. The bars a have the ribs 0formed along their sides,which act to hold and bind more securely theconcrete which surrounds said bars. I11 order to give greater strengthand rigidity to the construction, we support the bars a on their edges.The lower edges of the bars 0, at the ends thereof, are

' slightly cut away, as at 0- to permitthe lower rib to rest upon theledge b, whereby a firmer support is given to said bars. The bars arelocated at the upper portion of the beam, as in the case illustrated.The floor and ceiling are'formed of one body of concrete. It isapparent, however, that by using another set of, bars the floor andceiling can be formed separately, leaving an air-space between them.

The bottom flange of the beam has the tiles 6 attached thereto, saidtiles having the pliable clips 6 projecting therefrom and engaging saidflange. This tile is set forth and claimed in an application filed by uson the 21st day of January, 1896, Serial No. 576,290. Concrete f maythen be used to cover the remainder of the beam. The upper ledges b arearranged at such distance from the flanges of the beam that the ends ofthe bars will fit snugly between said flanges and said ledges. In thismanner we support the bars securely on their edges, so that they willremain immovably fixed while the concrete to form the floor and ceilingis packed in around said bars.

What we claim as our invention, and desire to secure by Letters Patent,is-- In fireproof floors and ceilings, the combination with the I-beams,of ledges on the Webs thereof, cross-bars having ribs on the side faces,the lower edges of said bars being cut off at the ends thereof as far assaid ribs, said ribs resting on said ledges, and concrete completelyembedding said bars, substantially as set forth.

In testimony whereof we, the said CHARLES A. BALPH and ELISHA P. S.WRIGHT, have hereunto set our hands.

' CHARLES A. BALPI-I.

ELISHA P. S. WRIGHT. \Vitnesses:

Row. D. TorrEN, ROBERT C. TOTTEN.

